Character Analysis
Paul is Alexander's buddy. He doesn't get too much exposition as a character, but he does serve the important purpose of highlighting the importance of social life for children.
The boys' relationship mirrors the timeless frenemy dynamic we see in classic duos: the likes of Jo and Amy March, Helena and Hermia, Woody and Buzz.
Paul gets the praise for his sailboat drawing; he gets the best dessert at lunchtime; he gets to dictate who's friends and who's not. It's all pretty typical little kid schoolyard drama, but that doesn't make it any easier for Alexander to deal him him.
In other words, Paul's a stupid face.